java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:37,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:37,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:37,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:37,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:37,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:37,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:37,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:37,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:37,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:37,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:37,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:37,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:37,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:37,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:37,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:37,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:37,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:37,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:37,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:37,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:37,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:37,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:37,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:37,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:37,163 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:37,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:37,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:37,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:37,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:37,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:37,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:37,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:37,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:37,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:37,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:37,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:37,195 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:37,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:37,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:37,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:37,198 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:37,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:37,198 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:37,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:37,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:37,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:37,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:37,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:37,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:37,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:37,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:37,200 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:37,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:37,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:37,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:37,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:37,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:37,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:37,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:37,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:37,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:37,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:37,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:37,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:37,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:37,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:37,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:37,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:37,478 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:37,478 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:37,479 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-13 18:02:37,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/346fc68dd/71797d7f988348339dbae467b8afd7a8/FLAG116a26561 [2019-10-13 18:02:38,100 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:38,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-13 18:02:38,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/346fc68dd/71797d7f988348339dbae467b8afd7a8/FLAG116a26561 [2019-10-13 18:02:38,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/346fc68dd/71797d7f988348339dbae467b8afd7a8 [2019-10-13 18:02:38,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:38,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:38,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:38,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:38,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:38,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:38" (1/1) ... [2019-10-13 18:02:38,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:38, skipping insertion in model container [2019-10-13 18:02:38,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:38" (1/1) ... [2019-10-13 18:02:38,409 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:38,464 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:39,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:39,069 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:39,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:39,256 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:39,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39 WrapperNode [2019-10-13 18:02:39,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:39,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:39,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:39,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:39,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... [2019-10-13 18:02:39,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:39,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:39,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:39,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:39,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:39,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:39,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:39,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:40,922 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:40,922 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:40,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:40 BoogieIcfgContainer [2019-10-13 18:02:40,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:40,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:40,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:40,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:40,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:38" (1/3) ... [2019-10-13 18:02:40,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e8782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:40, skipping insertion in model container [2019-10-13 18:02:40,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:39" (2/3) ... [2019-10-13 18:02:40,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e8782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:40, skipping insertion in model container [2019-10-13 18:02:40,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:40" (3/3) ... [2019-10-13 18:02:40,932 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2019-10-13 18:02:40,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:40,950 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:40,961 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:40,987 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:40,988 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:40,988 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:40,988 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:40,988 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:40,988 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:40,989 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:40,989 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 18:02:41,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:41,021 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:41,023 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2019-10-13 18:02:41,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:41,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997614155] [2019-10-13 18:02:41,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:41,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997614155] [2019-10-13 18:02:41,410 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:41,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:41,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858617453] [2019-10-13 18:02:41,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:41,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:41,432 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:43,838 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:43,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:43,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-10-13 18:02:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:43,864 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:43,864 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:43,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:43,967 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2019-10-13 18:02:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:43,968 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:43,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 18:02:43,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:43,974 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:43,975 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2019-10-13 18:02:43,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:43,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890455383] [2019-10-13 18:02:43,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:43,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:43,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:44,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890455383] [2019-10-13 18:02:44,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:44,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:44,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336852422] [2019-10-13 18:02:44,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:44,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:44,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:44,280 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:46,193 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:02:46,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:46,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 121 [2019-10-13 18:02:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:46,201 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:02:46,202 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:02:46,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:02:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:02:46,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:02:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:02:46,239 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2019-10-13 18:02:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:46,240 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:02:46,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:02:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 18:02:46,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:46,243 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:46,243 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2019-10-13 18:02:46,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:46,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396268335] [2019-10-13 18:02:46,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:46,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396268335] [2019-10-13 18:02:46,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823058859] [2019-10-13 18:02:46,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:46,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:46,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:46,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:46,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756694307] [2019-10-13 18:02:46,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:46,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:46,626 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:02:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:47,502 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2019-10-13 18:02:47,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:47,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2019-10-13 18:02:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:47,508 INFO L225 Difference]: With dead ends: 1676 [2019-10-13 18:02:47,508 INFO L226 Difference]: Without dead ends: 1116 [2019-10-13 18:02:47,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-13 18:02:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-13 18:02:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-13 18:02:47,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2019-10-13 18:02:47,543 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 130 [2019-10-13 18:02:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:47,544 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2019-10-13 18:02:47,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2019-10-13 18:02:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-13 18:02:47,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:47,550 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:47,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:47,755 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash 511372486, now seen corresponding path program 1 times [2019-10-13 18:02:47,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:47,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332183368] [2019-10-13 18:02:47,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:47,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:47,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 109 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:48,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332183368] [2019-10-13 18:02:48,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189183680] [2019-10-13 18:02:48,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:48,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:48,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 18:02:48,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:48,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2019-10-13 18:02:48,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812584127] [2019-10-13 18:02:48,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:48,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:02:48,964 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand 5 states. [2019-10-13 18:02:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:50,269 INFO L93 Difference]: Finished difference Result 2268 states and 3089 transitions. [2019-10-13 18:02:50,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:50,272 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2019-10-13 18:02:50,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:50,280 INFO L225 Difference]: With dead ends: 2268 [2019-10-13 18:02:50,281 INFO L226 Difference]: Without dead ends: 1342 [2019-10-13 18:02:50,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-10-13 18:02:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1318. [2019-10-13 18:02:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2019-10-13 18:02:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1692 transitions. [2019-10-13 18:02:50,326 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1692 transitions. Word has length 233 [2019-10-13 18:02:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:50,327 INFO L462 AbstractCegarLoop]: Abstraction has 1318 states and 1692 transitions. [2019-10-13 18:02:50,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1692 transitions. [2019-10-13 18:02:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-13 18:02:50,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:50,334 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:50,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:50,538 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2019-10-13 18:02:50,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:50,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055799693] [2019-10-13 18:02:50,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:50,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:50,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 130 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:51,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055799693] [2019-10-13 18:02:51,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344882070] [2019-10-13 18:02:51,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:51,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:51,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 258 proven. 53 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 18:02:51,892 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:51,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:51,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992615071] [2019-10-13 18:02:51,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:51,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:51,894 INFO L87 Difference]: Start difference. First operand 1318 states and 1692 transitions. Second operand 16 states. [2019-10-13 18:02:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:55,704 INFO L93 Difference]: Finished difference Result 3144 states and 4067 transitions. [2019-10-13 18:02:55,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:02:55,704 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 317 [2019-10-13 18:02:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:55,716 INFO L225 Difference]: With dead ends: 3144 [2019-10-13 18:02:55,716 INFO L226 Difference]: Without dead ends: 1785 [2019-10-13 18:02:55,720 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:02:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2019-10-13 18:02:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1694. [2019-10-13 18:02:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1694 states. [2019-10-13 18:02:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 1967 transitions. [2019-10-13 18:02:55,786 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 1967 transitions. Word has length 317 [2019-10-13 18:02:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:55,787 INFO L462 AbstractCegarLoop]: Abstraction has 1694 states and 1967 transitions. [2019-10-13 18:02:55,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 1967 transitions. [2019-10-13 18:02:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-10-13 18:02:55,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:55,794 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:55,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:55,998 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:55,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2019-10-13 18:02:55,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:55,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546673367] [2019-10-13 18:02:55,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:55,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:55,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:56,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546673367] [2019-10-13 18:02:56,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518886963] [2019-10-13 18:02:56,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:02:56,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:56,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:02:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-10-13 18:02:57,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:57,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-10-13 18:02:57,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642229176] [2019-10-13 18:02:57,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:57,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:57,044 INFO L87 Difference]: Start difference. First operand 1694 states and 1967 transitions. Second operand 5 states. [2019-10-13 18:02:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:58,097 INFO L93 Difference]: Finished difference Result 4154 states and 4953 transitions. [2019-10-13 18:02:58,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:58,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 342 [2019-10-13 18:02:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:58,109 INFO L225 Difference]: With dead ends: 4154 [2019-10-13 18:02:58,109 INFO L226 Difference]: Without dead ends: 2466 [2019-10-13 18:02:58,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2019-10-13 18:02:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2464. [2019-10-13 18:02:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2464 states. [2019-10-13 18:02:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2910 transitions. [2019-10-13 18:02:58,181 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2910 transitions. Word has length 342 [2019-10-13 18:02:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:58,182 INFO L462 AbstractCegarLoop]: Abstraction has 2464 states and 2910 transitions. [2019-10-13 18:02:58,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2910 transitions. [2019-10-13 18:02:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2019-10-13 18:02:58,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:58,193 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:58,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:58,397 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1203933665, now seen corresponding path program 1 times [2019-10-13 18:02:58,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:58,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216146549] [2019-10-13 18:02:58,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:58,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:58,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 386 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 18:02:59,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216146549] [2019-10-13 18:02:59,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639822784] [2019-10-13 18:02:59,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:59,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:59,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 561 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 18:02:59,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:59,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:02:59,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186054004] [2019-10-13 18:02:59,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:59,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:59,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:59,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:59,711 INFO L87 Difference]: Start difference. First operand 2464 states and 2910 transitions. Second operand 9 states. [2019-10-13 18:03:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:01,484 INFO L93 Difference]: Finished difference Result 5122 states and 6138 transitions. [2019-10-13 18:03:01,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:03:01,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 452 [2019-10-13 18:03:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:01,501 INFO L225 Difference]: With dead ends: 5122 [2019-10-13 18:03:01,502 INFO L226 Difference]: Without dead ends: 2846 [2019-10-13 18:03:01,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 465 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-13 18:03:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2650. [2019-10-13 18:03:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2650 states. [2019-10-13 18:03:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2650 states to 2650 states and 3066 transitions. [2019-10-13 18:03:01,580 INFO L78 Accepts]: Start accepts. Automaton has 2650 states and 3066 transitions. Word has length 452 [2019-10-13 18:03:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:01,581 INFO L462 AbstractCegarLoop]: Abstraction has 2650 states and 3066 transitions. [2019-10-13 18:03:01,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2650 states and 3066 transitions. [2019-10-13 18:03:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2019-10-13 18:03:01,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:01,588 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:01,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:01,795 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1066963527, now seen corresponding path program 1 times [2019-10-13 18:03:01,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:01,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184201687] [2019-10-13 18:03:01,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 518 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-13 18:03:03,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184201687] [2019-10-13 18:03:03,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78652539] [2019-10-13 18:03:03,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:03,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:03,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 762 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-10-13 18:03:04,127 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:04,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:04,127 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592687346] [2019-10-13 18:03:04,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:04,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:04,129 INFO L87 Difference]: Start difference. First operand 2650 states and 3066 transitions. Second operand 12 states. [2019-10-13 18:03:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:06,140 INFO L93 Difference]: Finished difference Result 5398 states and 6267 transitions. [2019-10-13 18:03:06,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:06,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 536 [2019-10-13 18:03:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:06,153 INFO L225 Difference]: With dead ends: 5398 [2019-10-13 18:03:06,154 INFO L226 Difference]: Without dead ends: 2897 [2019-10-13 18:03:06,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 555 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2019-10-13 18:03:06,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2642. [2019-10-13 18:03:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-10-13 18:03:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 2952 transitions. [2019-10-13 18:03:06,217 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 2952 transitions. Word has length 536 [2019-10-13 18:03:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:06,218 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 2952 transitions. [2019-10-13 18:03:06,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 2952 transitions. [2019-10-13 18:03:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2019-10-13 18:03:06,224 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:06,224 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:06,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:06,433 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1282643571, now seen corresponding path program 2 times [2019-10-13 18:03:06,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:06,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041256872] [2019-10-13 18:03:06,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:06,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:06,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 741 proven. 162 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-13 18:03:07,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041256872] [2019-10-13 18:03:07,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378381396] [2019-10-13 18:03:07,495 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:07,647 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:07,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:07,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:07,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:07,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 788 proven. 2 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-13 18:03:08,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:08,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:08,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124086572] [2019-10-13 18:03:08,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:08,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:08,160 INFO L87 Difference]: Start difference. First operand 2642 states and 2952 transitions. Second operand 17 states. [2019-10-13 18:03:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:14,026 INFO L93 Difference]: Finished difference Result 5704 states and 6502 transitions. [2019-10-13 18:03:14,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-13 18:03:14,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 562 [2019-10-13 18:03:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:14,038 INFO L225 Difference]: With dead ends: 5704 [2019-10-13 18:03:14,038 INFO L226 Difference]: Without dead ends: 3250 [2019-10-13 18:03:14,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 605 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=619, Invalid=2687, Unknown=0, NotChecked=0, Total=3306 [2019-10-13 18:03:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2019-10-13 18:03:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2648. [2019-10-13 18:03:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2648 states. [2019-10-13 18:03:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 2942 transitions. [2019-10-13 18:03:14,115 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 2942 transitions. Word has length 562 [2019-10-13 18:03:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:14,116 INFO L462 AbstractCegarLoop]: Abstraction has 2648 states and 2942 transitions. [2019-10-13 18:03:14,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 18:03:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 2942 transitions. [2019-10-13 18:03:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 626 [2019-10-13 18:03:14,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:14,124 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:14,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:14,336 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1611163502, now seen corresponding path program 1 times [2019-10-13 18:03:14,337 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:14,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922222943] [2019-10-13 18:03:14,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,338 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat